REGB_ENABLE_RESET
m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state | REGB_ENABLE_RESET);
m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state | REGB_ENABLE_RESET);
m3_wr_1(sc, DSP_PORT_CONTROL_REG_B, reset_state & ~REGB_ENABLE_RESET);